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John McMahon

Photo of John McMahon

Photo: © Nathaniel Chadwick

About the Author

John McMahon is the author of The Good Detective and One Good Deed. In his role as an ad agency creative director, he has won a Gold Clio for his work on Fiat, and he’s written a Superbowl spot for Alfa Romeo. He currently lives in Southern California with his family and two rescue animals.

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A P.T. Marsh Novel

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